Assessment and improvement of mapping algorithms for non-matching meshes and geometries in computational FSI
Assessment and improvement of mapping algorithms for non-matching meshes and geometries in computational FSI
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DOI：
10.1007/s00466-016-1262-6
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发表时间：
2016-05
影响因子：
4.1
通讯作者：
T. Wang;R. Wüchner;S. Sicklinger;K. Bletzinger
中科院分区：
文献类型：
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作者：
T. Wang;R. Wüchner;S. Sicklinger;K. Bletzinger
本文研究了流固耦合中非匹配网格与几何之间的数据映射问题。研究了曲面网格映射算法，包括最近元插值法、标准迫击法和双迫击法，并进行了对比评价。新提出的强制一致性方法解决了Mortar方法在流体-结构-界面弯曲边界上的不一致性问题，即使在流体边界面上由于高度流体精化而完全不与结构边界单元接触的情况下，该方法也具有足够的鲁棒性。此外，对具有代表性的几何形状的测试表明，Morar方法适用于保守映射，但最好直接使用最近的单元插值法，而且Dual Morar方法可以给出轻微的振荡。本文还提出了一种一维梁单元的旋转映射算法。它的新颖性在于处理大位移和大旋转的能力。
This paper investigates data mapping between non-matching meshes and geometries in fluid-structure interaction. Mapping algorithms for surface meshes including nearest element interpolation, the standard mortar method and the dual mortar method are studied and comparatively assessed. The inconsistency problem of mortar methods at curved edges of fluid-structure-interfaces is solved by a newly developed enforcing consistency approach, which is robust enough to handle even the case that fluid boundary facets are totally not in contact with structure boundary elements due to high fluid refinement. Besides, tests with representative geometries show that the mortar methods are suitable for conservative mapping but it is better to use the nearest element interpolation in a direct way, and moreover, the dual mortar method can give slight oscillations. This work also develops a co-rotating mapping algorithm for 1D beam elements. Its novelty lies in the ability of handling large displacements and rotations.